程 欢¹，杨 腾¹，崔 帅¹，徐正锐¹，冷 豪¹，钱云楼²，林龙沅¹，陈海焱¹

(1. 西南科技大学 环境与资源学院，四川 绵阳 621000；2. 浙江安防职业技术学院 智慧安全协同创新中心，浙江 温州 325016)

DOI:10.13732/j.issn.1008-5548.2022.03.009

收稿日期： 2021-11-18， 修回日期：2022-03-04，在线出版时间：2022-05-05。

基金项目：四川省科技计划资助项目，编号：20ZDYF12135；温州市科技局基础性科研项目，编号：G20180031。

第一作者简介：程欢(1995—)，女，硕士研究生，研究方向为工业通风除尘。E-mail：1510978935@qq.com。

通信作者简介：林龙沅(1981—)，男，副教授，博士，研究方向为气流粉碎、分级与除尘净化。E-mail：LLy7572@126.com。

摘要：为了探究不同长宽比条缝式喷吹孔对扁式方框滤筒清灰性能的影响，通过改变喷吹压力和喷吹距离，研究3种条缝喷吹孔条件下，扁式方框滤筒正对喷吹孔和非正对喷吹孔的侧壁压力峰值及其变化规律；通过工业覆粉试验，探讨除尘系统的运行阻力和清灰后滤筒的粉尘残余量大小，验证条缝式喷吹孔适用的清灰参数。结果表明：最佳的条缝式喷吹孔宽度、长度分别为1、 39 mm,且条缝宽度越大，正对喷吹孔压力越大，非正对喷吹孔压力越小，滤筒表面压力分布不均匀程度增加；宽度和长度分别为1、 39 mm和3、13 mm的条缝式喷吹孔的最佳适用喷吹距离分别为20～40、 40 mm。扁式方框滤筒适用的过滤风速越小，系统运行阻力越小，粉尘残余量越少，清灰效果越好，过滤风速为0.6 m/min、喷吹压力为0.3 MPa时可满足清灰要求。

关键词：条缝式喷吹孔；扁式方框滤筒；压力峰值；运行阻力；粉尘残余量

Abstract：To understand the effect of slot-type nozzles with different length-width ratios on cleaning performance of flat filter cartridge, the peak pressure of positive(pulse hole opposite to filter panel)and non-positive pulse airflows with three kinds of nozzles were examined under different pulse pressures and jet distances. The rule of peak pressure will be found. Through further industrial tests, the systemic resistance and residual dust were measured and weighed to determine the best parameter combination. The results show that the best slot-type nozzle is 1 mm×39 mm(width×length). Then the peak pressure of opposite nozzles is increasing and the peak pressure of non-opposite nozzles is decreasing when the width of slot-type nozzles is increasing, the uneven pressure distribution on the surface of flat filter increases. Under the same condition, the optimal jet distance of the 1 mm×39 mm slot-type nozzle is 20～40 mm, and the optimal jet distance of the 3 mm×13 mm slot-type nozzle is 40 mm. Moreover, the smaller the flat filtration velocity, the smaller the systematic resistance and the less the residual dust cakes lead to the better cleaning performance of flat filter cartridge. The fundamental demands of dust-cleaning will be met with a pulse pressure of 0.3 MPa when the flat filtration velocity is 0.6 m/min.

Keywords：slot-type nozzles; flat filter cartridge; peak pressure; resistance; residual dust

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